Year	% female
1970	49.40404
1971	49.37132
1972	49.25455
1973	49.35322
1974	49.22184
1975	49.24784
1976	49.17641
1977	49.2088
1978	49.52302
1979	49.18637
1980	49.2001
1981	49.18086
1982	49.11483
1984	49.28395
1985	49.42434
1986	49.11248
1987	49.34345
1988	50.63092
1990	49.09786
1991	49.09594
1996	48.94371
1997	49.2139
1998	48.9743
1999	49.24199
2000	49.0851
2001	49.09796
2002	49.08889
2003	49.05026
2004	48.97273
2005	48.92995
2006	48.99691
2007	49.05478
2008	49.01723
2009	48.99872
2010	48.79207
2011	48.81167
2012	48.80953
2013	48.89107
2014	49.04683
2015	49.06351
2016	49.03375
2017	49.04022